PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6656Bearing,sleeve

Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor · NSN 3120-00-237-7682 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-237-7682 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-237-7682. Primary manufacturer part number: 6656.
Features
  • Bearing,sleeve — FSC 3120
  • Corner Shape: SQUARE OUTSIDE LEFT CORNER
  • Style Designator: SEGMENTED, PLAIN, NO OUTSIDE FLANGES
  • Corner Shape: SQUARE OUTSIDE RIGHT CORNER
  • Material: LEAD ALLOY INNER LAYER
  • Corner Shape: CHAMFERED INSIDE LEFT CORNER
  • Lubricant Accommodation Style: GROOVED CIRCULAR
  • Corner Shape: CHAMFERED INSIDE RIGHT CORNER
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Lead Alloy Inner Layer construction
General Description

The Bearing,sleeve, cataloged under National Stock Number 3120-00-237-7682, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3120-00-237-7682
Primary Part Number6656
Item NameBearing,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerQuincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor
StatusACTIVE
Corner ShapeSQUARE OUTSIDE LEFT CORNER
Style DesignatorSEGMENTED, PLAIN, NO OUTSIDE FLANGES
Corner ShapeSQUARE OUTSIDE RIGHT CORNER
MaterialLEAD ALLOY INNER LAYER
Corner ShapeCHAMFERED INSIDE LEFT CORNER
Lubricant Accommodation StyleGROOVED CIRCULAR
Corner ShapeCHAMFERED INSIDE RIGHT CORNER
Hole Diameter0.1875 INCHES NOMINAL FIRST IN
Body Outside Diameter2.3960 INCHES MINIMUM AND 2.3970 INCHES MAXIMUM IN
Surface Groove Location and Quantity1 INTERNAL
MaterialSTEEL OUTER LAYER
Body Inside Diameter2.2505 INCHES MINIMUM AND 2.2510 INCHES MAXIMUM IN
Antirotation/lubrication Type and Quantity2 HOLE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5133-00-061-628844476 INTERCHANGEABLE
Drill,twist
Greenfield Industries Inc
4940-00-318-9078 INTERCHANGEABLE
Adapter
4820-00-450-9840665-6 INTERCHANGEABLE
Cartridge,check Valve
Admiral Valve Llc Dba Cpv Manufacturing
5330-00-556-7134 INTERCHANGEABLE
Packing Material
4820-00-690-20686656 INTERCHANGEABLE
Diaphragm,valve,flat
Imi Cash Valve Inc
5950-00-813-8352SM-D-415301 INTERCHANGEABLE
Transformer,audio Frequency
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5950-00-947-6643 INTERCHANGEABLE
Coil,radio Frequency
4320-01-037-4793622/6656 INTERCHANGEABLE
Diaphragm Assembly
Coffin Turbo Pump Inc
5330-01-295-68296656 INTERCHANGEABLE
Retainer,packing
Davis Frank T and Associates
4820-01-438-15586290-G501 INTERCHANGEABLE
Cock,poppet Drain
Howell Laboratories Inc Dba Howell Laboratories Inc
Cross-Reference Index
Part NumberManufacturer
6656 PRIMARY Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor (USA)
Related Parts
5133-00-061-6288INTERCHANGEABLE
DRILL,TWIST
44476
4940-00-318-9078INTERCHANGEABLE
ADAPTER
4820-00-450-9840INTERCHANGEABLE
CARTRIDGE,CHECK VALVE
665-6
5330-00-556-7134INTERCHANGEABLE
PACKING MATERIAL
4820-00-690-2068INTERCHANGEABLE
DIAPHRAGM,VALVE,FLAT
6656
5950-00-813-8352INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
SM-D-415301
5950-00-947-6643INTERCHANGEABLE
COIL,RADIO FREQUENCY
4320-01-037-4793INTERCHANGEABLE
DIAPHRAGM ASSEMBLY
622/6656
5330-01-295-6829INTERCHANGEABLE
RETAINER,PACKING
6656
4820-01-438-1558INTERCHANGEABLE
COCK,POPPET DRAIN
6290-G501

Frequently Asked Questions

What is NSN 3120-00-237-7682?

NSN 3120-00-237-7682 is a Bearing,sleeve, manufactured by Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-237-7682?

NSN 3120-00-237-7682 has 1 cross-referenced part number: 6656 (Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor).

What NSN replaces 3120-00-237-7682?

There are 10 known substitutes for 3120-00-237-7682: 5133-00-061-6288, 4940-00-318-9078, 4820-00-450-9840 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 6656?

Key specifications for 6656: Corner Shape: SQUARE OUTSIDE LEFT CORNER; Style Designator: SEGMENTED, PLAIN, NO OUTSIDE FLANGES; Corner Shape: SQUARE OUTSIDE RIGHT CORNER; Material: LEAD ALLOY INNER LAYER. 15 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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